Thermal and mechanical properties of hardened cement paste reinforced with Posidonia-Oceanica natural fibers

Hamdaoui, Ons; Limam, Oualid; Ibos, Laurent; Mazioud, Atef

doi:10.1016/j.conbuildmat.2020.121339

Cited by 29 publications

(8 citation statements)

References 35 publications

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“…Eco-friendly biodegradable composites made with natural fibers are more efficient, long-term, and adaptable solution to environmental and economic problems Many scientific studies focus on testing composites based on Posidonia-Oceanica (PO) alone or mixed with another type of fiber in order to develop efficient, low-cost, and sustainable bio-composite material. [1][2][3][4][5] The addition of PO seagrass and wood fibers products is a sustainable and environmentally friendly solution to improve the major properties of gypsum products. 1 PO fibers have thermal conductivity and diffusivity comparable to conventional insulation materials.…”

Section: Introductionmentioning

confidence: 99%

“…3 Biocomposites with PO and pine-wood particles were tested as an alternative to structural wood particle boards in construction. 3 Hamdaoui et al 4 focus on thermal and mechanical characteristics of a cement paste reinforced with PO balls for building application. Safont et al 5 suppose the valorization of PO seagrass waste in industrial food packaging applications The effects of alkali treatment was investigated on various natural fibers at different conditions (time, pressure, and concentration) by many researchers.…”

Section: Introductionmentioning

confidence: 99%

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Valorization of Posidonia-Oceanica leaves for the building insulation sector

Mehrez

Hachem

Gheith

et al. 2022

Journal of Composite Materials

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A new bio-composite material appropriate for building thermal insulation is proposed. The hydrophilic, thermal, and mechanical properties of composites made with Posidonia-Oceanica leaves, are experimentally investigated. The effect of two different sizes of fibers (natural and crushed leaves) as well as the effect of the chemical treatment (1% sodium hydroxide) are studied. For this purpose, different parallelepipedic specimens of dimensions 270 × 270 × 30 mm3 (thermal properties tests) and 160 × 40 × 40 mm3 (mechanical properties tests) were prepared by varying densities of leaves (0, 5, 10, 15, 20, and 30% by volume). In comparison to the fiber size effect, the results reveal that fiber loading has a significant impact on the mechanical and thermal characteristics of composites. Alkali treatment can improve the compressive and flexural strength of bio-composites. The novel bio-composites have low thermal conductivity (0.09 W.m−1K−1 when 30% of reduced size Posidonia-Oceanica leaves were loaded into the reference mortar) and acceptable mechanical performances. Results also show (1) The addition of treated fiber improves the ductility of the material. (2) The fracture toughness is 75% greater than reference mortar. (3) The use of crushed fibers decreases the composite’s mechanical strengths. (4) The flexural strength decreases with the fibers content and increase after 1% sodium hydroxide treatment. It can be concluded that the proposed bio-composite can be employed as thermal insulation material.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Valorization of Posidonia-Oceanica leaves for the building insulation sector

Mehrez

Hachem

Gheith

et al. 2022

Journal of Composite Materials

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“…A probe (reference 5465) with a radius of 3189 mm was used. A heating power of 80 mW was applied for 20 s. Further details concerning this method are available in [ 21 , 22 , 23 , 24 , 25 ].…”

Section: Methodsmentioning

confidence: 99%

The Development of a New Phosphogypsum-Based Construction Material: A Study of the Physicochemical, Mechanical and Thermal Characteristics

et al. 2021

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Phosphogypsum (PG) is a waste (or by-product) of the production of phosphoric acid, a basic constituent in the manufacturing of modern fertilizers. The annual production of phosphogypsum in Tunisia is currently estimated to be 10 million tons. Its storage in slag in close proximity to production plants generates pollution problems; however, valorization may be a solution. The present paper proposes a simple process for the valorization of this by-product into a construction material. Several physicochemical characterizations are used to prove the characteristics of samples. The chemical composition shows that PG is a gypsum compound with several impurities. The morphological analyses show that the powder materials are mesoporous with a lower specific area. The structural characterizations show that these solids play the role of a water pump as the degree of hydration changes from 2 to 0 and vice versa, depending on the temperature. Mechanical and thermal analyses show that the prepared formulation is brittle and insulating, which presents opportunities for it to be used as a decoration material.

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“…These values are close to conventional insulation materials. Concrete composites with PO fibers ranging from 5% to 10% have higher compressive strengths; the strength properties decrease with a further increase in the volume fraction of fibers due to agglomeration [13]. The mechanical properties of chemically treated jute and bamboo fibers increase for fiber addition up to 1.5% when compared with concrete without fibers [14].…”

Section: Introductionmentioning

confidence: 99%

“…Hamdaoui et al [13] studied the thermal and mechanical properties of a hardened cement paste reinforced with PO fibers with volume fractions varying from 0% to 20%. The thermal conductivity, the tensile and compressive strength, and the variation in tenacity as a function of the volume fraction of the fibers and the geometric characteristics of the samples were estimated using the simplified models developed.…”

Section: Introductionmentioning

confidence: 99%

Effect of Posidonia oceanica Fibers Addition on the Thermal and Acoustic Properties of Cement Paste

et al. 2022

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The present work focused on the experimental study of the mechanical, thermal and acoustic properties of cement composite reinforced using Posidonia oceanica (PO) fibers. For this purpose, parallelepipedic specimens of dimensions 270 mm × 270 mm × 40 mm and cubic specimens of dimensions 150 mm × 150 mm × 150 mm were prepared with a water-to-cement ratio of 0.50 by varying the volume of fibers (Vf) from 0% to 20%. Properties such as compressive strength, thermal conductivity, thermal diffusivity, standardized level difference and sound transmission class were examined. The compressive strength of the specimens was determined using the rebound hammer test, while the thermal measurements were performed with the steady-state box method. The results showed that the addition of PO fibers improved the compressive strength of the mixtures and produced a maximum value of 33.60 MPa for a 10% volume of fiber content. Thermal conductivity and thermal diffusivity decreased significantly with the addition of fibers for all the mixtures. The experimental investigation also showed that the sound transmission class of PO-fiber-reinforced cementitious composites decreased as the fiber volume increased due to an increase in air voids in the mixtures.

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Thermal and mechanical properties of hardened cement paste reinforced with Posidonia-Oceanica natural fibers

Cited by 29 publications

References 35 publications

Valorization of Posidonia-Oceanica leaves for the building insulation sector

Valorization of Posidonia-Oceanica leaves for the building insulation sector

The Development of a New Phosphogypsum-Based Construction Material: A Study of the Physicochemical, Mechanical and Thermal Characteristics

Effect of Posidonia oceanica Fibers Addition on the Thermal and Acoustic Properties of Cement Paste

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